2190365191 has 4 divisors (see below), whose sum is σ = 2503274512. Its totient is φ = 1877455872.

The previous prime is 2190365189. The next prime is 2190365207. The reversal of 2190365191 is 1915630912.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2190365191 - 2¹ = 2190365189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2190365191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2190365101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156454650 + ... + 156454663.

It is an arithmetic number, because the mean of its divisors is an integer number (625818628).

Almost surely, 2^2190365191 is an apocalyptic number.

2190365191 is a deficient number, since it is larger than the sum of its proper divisors (312909321).

2190365191 is an equidigital number, since it uses as much as digits as its factorization.

2190365191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312909320.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 2190365191 is about 46801.3374915718. The cubic root of 2190365191 is about 1298.6900396179.

The spelling of 2190365191 in words is "two billion, one hundred ninety million, three hundred sixty-five thousand, one hundred ninety-one".